Means for operating car-doors.



'T. SGULLIN & s. R. SKOV. MEANS FOR OPERATING GAR DOORS. APPLICATION FILED JAN. 26, 1912.

l 0719 & RI

Patented Aug. 26, 1913.

W! TNESSES m siA'rEs MEANS. IFQB OPE-EATING FAR-DOORS.

Bpeeiflcation of Lette s Patents,

PATENT torsion.

' Tremor scunmu can seem consumer sxov, or ctnv'srsim, oar-o.

Patented Aug. 26, 1913.

Application filed January 26, 1912. Serial No. 673,645.

In our application forLetters Patent of the United States executed of even date, we

disclose means for operating car doors especiall rear p atform, whereas 1n the present application, we disclose preferred means for operating the car doors from the front plat;

, :hanger 14, while the tether end is seated form.

The broad feature of our invention, namely the slip joint between the door 'and the operating mechanism \to permit said mechanism to'continue its movement when the door meets an obstruction, and means for storing energy when said mechanism operated independently of the door to close the door after the obstruction is removed, is'not claimed in this application serial No. 673,646, filed JanuaryQG, 1912,95 claims for such broad invention are made in the companion application.

In the drawing, Figu I tion of a car, parts bein brokenawa'y, illustriiting our invention; *igf2 is a top plan view of thcdoor tracks, the doors and arts of the car structure in section, and 'ig. 8 is an end elevation showing the relative po- "sitions of the pinion, cylinder, the doors and the track, parts being in section.

The numeral 1 designates the car broken away, there being a panel or partition 2 and ,3 forming the outer wall of the car at each side of-the door opening.

4 is the outer door track and 5 the inner door track, which extend across the. door.

opening and between the side of'the car and the panel orpartition 2 s ell}, as clearly showninFig.2.' A p 6' and 7 are the outer doors and 9 and 8 are the'inner doors; theouter doors being provided with a weather 's'tri 10, clearly 9 shown in Fig. 2. The inner oors 9 and 8 are suspended from the track 5 by means of the hanger Jgrackets 11- and 12, Whilethe jouter doors 6 and 7 aresuspended fromthe track/i by means of the. hangers l3 and 14, all of said hangers being provided with suitable curved; wheels adapted to run on adapted for operation from the re 1 isa side elevathe door tracks. The outer doors are each provided with a second hanger carrying a curved roller adapted to moveon the door track. \N

15 are stationary rackbars secured to the car structure. F

16 are gear wheels ournaled upon the inclearly seen in the drawing.

17 isa track attached to the outer wall ner door =.-brackets ll, 12, respectively, as '1 of the door casing, on which the racks 1S and 19 are "slidably mounted by means of ;the guides,20,.21 22 and23.

'24 is a rod'positioned between the guides '21 and 22 around which is coilede spring 26, one end of which presses against the against the abutment which is spar-tot 1 the rack at 21J The'parts 25, 22,23,13 and 27 on the left hand of Fig. 1 are duplicates i-of those-first described, theretore further des rip n f the is unn cessa y- 5 it will be noted that one endof the rod 24 is screw-threaded in'a Suitable abutment socket on the guide '2Qfwhilethe other end is m un d. in th butm nt here being a loop A Ou bradkt l4 sliding Over rods 2 and 2 and. pe mitt ng the doersto av relative movement reason".Ofktlidibillzp es ed springs 26 over rods 24 a d.

" 2 1s an iten n from the bracket 11,

which isiada'pted to be connected to the PIStOII/I'Od 30 and locked thereto by means of the'nuts 31, whereby the inner door is positively locked to the piston rod.

32 1s a pistonsecured tov the rod, said rodand piston being inclosed. in the operating cylinder 33, which isprovided with an inlet 34 and an outlet 35, the cylinder being divided at the middle by a well, thus forin- .ing .two independent cylin irs and being connected'to the air supply of the car by suitable pipin and valves.

-Assuming t at the doors are closed, as shown in Fig. 1, air is admitted to the cyl- '-inder tlirougl the inlet 34 against the iston 32, wherebygthepiston 32 is moved 'ith its rod 30 towardthebhtlet 35. In this movement, the rod carries with it the ex tension 29 andthe door'bracket 11. As the bracket 11 and its extension are moved backward, the pinion ldhegins to rotate and acts upon rack 18 and propels it-with a velocity ,equal to twicethat of the doorbracket 11, inasmuch as'the rack 15 is stationary; The

motion of the rack 18 is transmitted to the outer door 7 through the rack 18 and through the bracket 14 and the movement of the doors is continued until they have reached their proper positions between the inner wall of the car and the outer Wall or panel 3, leaving a free unobstructed opening for passengers entering and leaving the car.

The closing motions are a reversal of those just recited, unless an object, for instance a person, is in the path of the door 7 as it is being closed. In such contingency, the rack 18 would continue to slide on the track 17 until it reaches its normal closed position; the loop A on bracket 1 1 would slide over rod- 24 thereby compressin the spring 26 until the object is removed from the path of the door, when the stored energy of the spring 26' would immediately propel the door 7 to its usual closed position. While in the description of the operation, We have referred only to the doors 7 and 9, it will be understood that the same description of operations applies to the doors 6 and 8, simul taneous with 7 and 9. It will also be un derstood that if only two doors are required on a car, one-half the structure illustrated in Fig. 1 need only be used.

We claim 1. The combination with a pair of sliding doors moving in the same direction, of an operating cylinder, a piston and piston rod mounted in said cylinder, means connectin one of said doors to said piston rod for positive movement therewith in both directions, means operatedby said door for moving the other door in the same direction simultaneously With the first named door.

2. The combination with a pair of sliding doors moving in t-he same direction, of an operating cylinder, a piston and piston rod mounted in said evlimler means connecting one of said doors to said piston rod for posiive movement therewith in both directions, means operated by said door for moving the other door in the same direction, but at a different rate of speed.

3. The combination with a pair of sliding doors moving in the same direction, of an operating cylinder, a piston and piston rod mounted in said cylinder, a bracket extending from one of said doors and rigidly connected to said piston rod, a stationary rack, a pinion journalcd on said door hanger, a slidably mounted rack, a rodmounted on abutments of said rack, and a spring coiled around said rod.

4. In a door operatin mechanism, the combination With a sli ing door, of a bracket secured thereto, a stationary rack bar, a pinion journaled on the said bracket and adapted to engage said stationary rack bar, a slidably mounted rack bar, an abutment on said rack, a second sliding door movable in the same direction as the firstnamed sliding door, a bracket extending from said second door, a rod rigidly secured at both ends to said sliding rack and a loop over said rod, a spring coiled around said rod between the loop and rack, said sliding rack connected to the bracket of the second named sliding door and adapted to engage the said pinion, whereby movement is transmitted from the first-named door to the second-named door through said sliding rack. The foregoing specification signed at Cleveland Ohio this 5 day pjJan, 191-2.

TERANGE soULLitN, SOREN ROBERTSON SKOV. In presence of I CHAS. A. D. C. SON, A. DE CArUon. 

